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          <h4 id="title">Custom Interactions</h4>
          <div id="map" class="map"></div>

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          <p id="shortdesc">Example of a custom interaction.</p>
          <div id="docs"><p>This example demonstrates creating a custom interaction by subclassing <code>ol.interaction.Pointer</code>. Note that the built in interaction <code>ol.interaction.Translate</code> might be a better option for moving features.</p>
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          <div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Feature.html" title="API documentation for ol.Feature">ol.Feature</a></li>,<li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.geom.LineString.html" title="API documentation for ol.geom.LineString">ol.geom.LineString</a></li>,<li><a href="../apidoc/ol.geom.Point.html" title="API documentation for ol.geom.Point">ol.geom.Point</a></li>,<li><a href="../apidoc/ol.geom.Polygon.html" title="API documentation for ol.geom.Polygon">ol.geom.Polygon</a></li>,<li><a href="../apidoc/ol.interaction.html" title="API documentation for ol.interaction">ol.interaction</a></li>,<li><a href="../apidoc/ol.interaction.Pointer.html" title="API documentation for ol.interaction.Pointer">ol.interaction.Pointer</a></li>,<li><a href="../apidoc/ol.layer.Tile.html" title="API documentation for ol.layer.Tile">ol.layer.Tile</a></li>,<li><a href="../apidoc/ol.layer.Vector.html" title="API documentation for ol.layer.Vector">ol.layer.Vector</a></li>,<li><a href="../apidoc/ol.source.TileJSON.html" title="API documentation for ol.source.TileJSON">ol.source.TileJSON</a></li>,<li><a href="../apidoc/ol.source.Vector.html" title="API documentation for ol.source.Vector">ol.source.Vector</a></li>,<li><a href="../apidoc/ol.style.Fill.html" title="API documentation for ol.style.Fill">ol.style.Fill</a></li>,<li><a href="../apidoc/ol.style.Icon.html" title="API documentation for ol.style.Icon">ol.style.Icon</a></li>,<li><a href="../apidoc/ol.style.Stroke.html" title="API documentation for ol.style.Stroke">ol.style.Stroke</a></li>,<li><a href="../apidoc/ol.style.Style.html" title="API documentation for ol.style.Style">ol.style.Style</a></li></ul></div>
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        <form method="POST" id="codepen-form" target="_blank" action="https://codepen.io/pen/define/">
          <textarea class="hidden" name="title">Custom Interactions</textarea>
          <textarea class="hidden" name="description">Example of a custom interaction.</textarea>
          <textarea class="hidden" name="js">/**
 * Define a namespace for the application.
 */
var app &#x3D; {};


/**
 * @constructor
 * @extends {ol.interaction.Pointer}
 */
app.Drag &#x3D; function() {

  ol.interaction.Pointer.call(this, {
    handleDownEvent: app.Drag.prototype.handleDownEvent,
    handleDragEvent: app.Drag.prototype.handleDragEvent,
    handleMoveEvent: app.Drag.prototype.handleMoveEvent,
    handleUpEvent: app.Drag.prototype.handleUpEvent
  });

  /**
   * @type {ol.Pixel}
   * @private
   */
  this.coordinate_ &#x3D; null;

  /**
   * @type {string|undefined}
   * @private
   */
  this.cursor_ &#x3D; &#x27;pointer&#x27;;

  /**
   * @type {ol.Feature}
   * @private
   */
  this.feature_ &#x3D; null;

  /**
   * @type {string|undefined}
   * @private
   */
  this.previousCursor_ &#x3D; undefined;

};
ol.inherits(app.Drag, ol.interaction.Pointer);


/**
 * @param {ol.MapBrowserEvent} evt Map browser event.
 * @return {boolean} &#x60;true&#x60; to start the drag sequence.
 */
app.Drag.prototype.handleDownEvent &#x3D; function(evt) {
  var map &#x3D; evt.map;

  var feature &#x3D; map.forEachFeatureAtPixel(evt.pixel,
      function(feature) {
        return feature;
      });

  if (feature) {
    this.coordinate_ &#x3D; evt.coordinate;
    this.feature_ &#x3D; feature;
  }

  return !!feature;
};


/**
 * @param {ol.MapBrowserEvent} evt Map browser event.
 */
app.Drag.prototype.handleDragEvent &#x3D; function(evt) {
  var deltaX &#x3D; evt.coordinate[0] - this.coordinate_[0];
  var deltaY &#x3D; evt.coordinate[1] - this.coordinate_[1];

  var geometry &#x3D; this.feature_.getGeometry();
  geometry.translate(deltaX, deltaY);

  this.coordinate_[0] &#x3D; evt.coordinate[0];
  this.coordinate_[1] &#x3D; evt.coordinate[1];
};


/**
 * @param {ol.MapBrowserEvent} evt Event.
 */
app.Drag.prototype.handleMoveEvent &#x3D; function(evt) {
  if (this.cursor_) {
    var map &#x3D; evt.map;
    var feature &#x3D; map.forEachFeatureAtPixel(evt.pixel,
        function(feature) {
          return feature;
        });
    var element &#x3D; evt.map.getTargetElement();
    if (feature) {
      if (element.style.cursor !&#x3D; this.cursor_) {
        this.previousCursor_ &#x3D; element.style.cursor;
        element.style.cursor &#x3D; this.cursor_;
      }
    } else if (this.previousCursor_ !&#x3D;&#x3D; undefined) {
      element.style.cursor &#x3D; this.previousCursor_;
      this.previousCursor_ &#x3D; undefined;
    }
  }
};


/**
 * @return {boolean} &#x60;false&#x60; to stop the drag sequence.
 */
app.Drag.prototype.handleUpEvent &#x3D; function() {
  this.coordinate_ &#x3D; null;
  this.feature_ &#x3D; null;
  return false;
};


var pointFeature &#x3D; new ol.Feature(new ol.geom.Point([0, 0]));

var lineFeature &#x3D; new ol.Feature(
    new ol.geom.LineString([[-1e7, 1e6], [-1e6, 3e6]]));

var polygonFeature &#x3D; new ol.Feature(
    new ol.geom.Polygon([[[-3e6, -1e6], [-3e6, 1e6],
      [-1e6, 1e6], [-1e6, -1e6], [-3e6, -1e6]]]));


var map &#x3D; new ol.Map({
  interactions: ol.interaction.defaults().extend([new app.Drag()]),
  layers: [
    new ol.layer.Tile({
      source: new ol.source.TileJSON({
        url: &#x27;https://api.tiles.mapbox.com/v3/mapbox.geography-class.json?secure&#x27;
      })
    }),
    new ol.layer.Vector({
      source: new ol.source.Vector({
        features: [pointFeature, lineFeature, polygonFeature]
      }),
      style: new ol.style.Style({
        image: new ol.style.Icon(/** @type {olx.style.IconOptions} */ ({
          anchor: [0.5, 46],
          anchorXUnits: &#x27;fraction&#x27;,
          anchorYUnits: &#x27;pixels&#x27;,
          opacity: 0.95,
          src: &#x27;https://openlayers.org/en/v4.6.5/examples/data/icon.png&#x27;
        })),
        stroke: new ol.style.Stroke({
          width: 3,
          color: [255, 0, 0, 1]
        }),
        fill: new ol.style.Fill({
          color: [0, 0, 255, 0.6]
        })
      })
    })
  ],
  target: &#x27;map&#x27;,
  view: new ol.View({
    center: [0, 0],
    zoom: 2
  })
});
</textarea>
          <textarea class="hidden" name="css"></textarea>
          <textarea class="hidden" name="html">&lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
</textarea>
          <input type="hidden" name="resources" value="https://openlayers.org/en/v4.6.5/css/ol.css,https://openlayers.org/en/v4.6.5/build/ol.js">
          <input type="hidden" name="data">
        </form>
        <pre><code id="example-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html&gt;
  &lt;head&gt;
    &lt;title&gt;Custom Interactions&lt;/title&gt;
    &lt;link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css"&gt;
    &lt;!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --&gt;
    &lt;script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"&gt;&lt;/script&gt;
    &lt;script src="https://openlayers.org/en/v4.6.5/build/ol.js"&gt;&lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
    &lt;script&gt;
      /**
       * Define a namespace for the application.
       */
      var app &#x3D; {};


      /**
       * @constructor
       * @extends {ol.interaction.Pointer}
       */
      app.Drag &#x3D; function() {

        ol.interaction.Pointer.call(this, {
          handleDownEvent: app.Drag.prototype.handleDownEvent,
          handleDragEvent: app.Drag.prototype.handleDragEvent,
          handleMoveEvent: app.Drag.prototype.handleMoveEvent,
          handleUpEvent: app.Drag.prototype.handleUpEvent
        });

        /**
         * @type {ol.Pixel}
         * @private
         */
        this.coordinate_ &#x3D; null;

        /**
         * @type {string|undefined}
         * @private
         */
        this.cursor_ &#x3D; &#x27;pointer&#x27;;

        /**
         * @type {ol.Feature}
         * @private
         */
        this.feature_ &#x3D; null;

        /**
         * @type {string|undefined}
         * @private
         */
        this.previousCursor_ &#x3D; undefined;

      };
      ol.inherits(app.Drag, ol.interaction.Pointer);


      /**
       * @param {ol.MapBrowserEvent} evt Map browser event.
       * @return {boolean} &#x60;true&#x60; to start the drag sequence.
       */
      app.Drag.prototype.handleDownEvent &#x3D; function(evt) {
        var map &#x3D; evt.map;

        var feature &#x3D; map.forEachFeatureAtPixel(evt.pixel,
            function(feature) {
              return feature;
            });

        if (feature) {
          this.coordinate_ &#x3D; evt.coordinate;
          this.feature_ &#x3D; feature;
        }

        return !!feature;
      };


      /**
       * @param {ol.MapBrowserEvent} evt Map browser event.
       */
      app.Drag.prototype.handleDragEvent &#x3D; function(evt) {
        var deltaX &#x3D; evt.coordinate[0] - this.coordinate_[0];
        var deltaY &#x3D; evt.coordinate[1] - this.coordinate_[1];

        var geometry &#x3D; this.feature_.getGeometry();
        geometry.translate(deltaX, deltaY);

        this.coordinate_[0] &#x3D; evt.coordinate[0];
        this.coordinate_[1] &#x3D; evt.coordinate[1];
      };


      /**
       * @param {ol.MapBrowserEvent} evt Event.
       */
      app.Drag.prototype.handleMoveEvent &#x3D; function(evt) {
        if (this.cursor_) {
          var map &#x3D; evt.map;
          var feature &#x3D; map.forEachFeatureAtPixel(evt.pixel,
              function(feature) {
                return feature;
              });
          var element &#x3D; evt.map.getTargetElement();
          if (feature) {
            if (element.style.cursor !&#x3D; this.cursor_) {
              this.previousCursor_ &#x3D; element.style.cursor;
              element.style.cursor &#x3D; this.cursor_;
            }
          } else if (this.previousCursor_ !&#x3D;&#x3D; undefined) {
            element.style.cursor &#x3D; this.previousCursor_;
            this.previousCursor_ &#x3D; undefined;
          }
        }
      };


      /**
       * @return {boolean} &#x60;false&#x60; to stop the drag sequence.
       */
      app.Drag.prototype.handleUpEvent &#x3D; function() {
        this.coordinate_ &#x3D; null;
        this.feature_ &#x3D; null;
        return false;
      };


      var pointFeature &#x3D; new ol.Feature(new ol.geom.Point([0, 0]));

      var lineFeature &#x3D; new ol.Feature(
          new ol.geom.LineString([[-1e7, 1e6], [-1e6, 3e6]]));

      var polygonFeature &#x3D; new ol.Feature(
          new ol.geom.Polygon([[[-3e6, -1e6], [-3e6, 1e6],
            [-1e6, 1e6], [-1e6, -1e6], [-3e6, -1e6]]]));


      var map &#x3D; new ol.Map({
        interactions: ol.interaction.defaults().extend([new app.Drag()]),
        layers: [
          new ol.layer.Tile({
            source: new ol.source.TileJSON({
              url: &#x27;https://api.tiles.mapbox.com/v3/mapbox.geography-class.json?secure&#x27;
            })
          }),
          new ol.layer.Vector({
            source: new ol.source.Vector({
              features: [pointFeature, lineFeature, polygonFeature]
            }),
            style: new ol.style.Style({
              image: new ol.style.Icon(/** @type {olx.style.IconOptions} */ ({
                anchor: [0.5, 46],
                anchorXUnits: &#x27;fraction&#x27;,
                anchorYUnits: &#x27;pixels&#x27;,
                opacity: 0.95,
                src: &#x27;https://openlayers.org/en/v4.6.5/examples/data/icon.png&#x27;
              })),
              stroke: new ol.style.Stroke({
                width: 3,
                color: [255, 0, 0, 1]
              }),
              fill: new ol.style.Fill({
                color: [0, 0, 255, 0.6]
              })
            })
          })
        ],
        target: &#x27;map&#x27;,
        view: new ol.View({
          center: [0, 0],
          zoom: 2
        })
      });
    &lt;/script&gt;
  &lt;/body&gt;
&lt;/html&gt;</code></pre>
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